Coking-retort oven



Sept. 15, 1925. 1,553,662

' J. BECKER COKING RETORT OVEN Filed June 11, 1921 8 Sheets-Sheet 1Sept. 15, 1925.

J. BECKER COKING RETORT OVEN Filed June 11, 1921 8 Sheets-Sheet 2 a E M,/%Ww SE 077 ON Sept. 15, 1925. 1,553,662

J. BECKER COKING RETORT OVEN Filed June 11, 1921 8 SheetS -She'et 5 COKEPUSHER SEG77ON B B v f wa zi ofle Sept. 15, 1925.

.1. BECKER I COKING RETORT OVEN 8 Sheets-Sheet 4' 'Filed June 11, 1921SEc r/ ON \LSECTION SECTION Sept- 15, 1925.

J. BECKER COKING RETQRT OVEN Filed June 11, 1921 8 Sheets-$heet 5 Sept.15, 1925.

J. BECK-ER COKING RETORT OVEN Sept. 15, 1925. I 1,553,662

J. BECKER COKING RETORT OVEN Filed June 11, 1921 8 Sheets-Sheet 7 Sept.15, 1925.

J. BECKER COKING RETORT QVEN Filed June 11, 1921 8 Sheets-Sheet s tmimslECT/ON Patented Sept. 15, 1925.

UNITED STATES 1,553,662 PATENT OFFICE.

JOSEPH BECKER,OI PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO THE KOPIERS COM-PANY, OI PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

COKING-RETORT OVEN.

Application filed June 11, 1921.

To all whom it may concern.

Be it known that I, JOSEPH BECKER, a

citizen of the United States, residing in Pittsbur h, in the county ofAllegheny and State of ennsylvania, have invented a new and usefulImprovement in Coking-Retort Ovens, of which the following is aspecification.

This invention comprehends improvements of general utility in the cokingretort oven art; and also comprehends certain improvements especiallyapplicable to coking retort ovens of the well-known cross-regenerativetype exemplified in the patent to H. Koppers No. 818,033, dated April19, 1906.

The invention has for objects the provision of'a coking retort oven,having, as important characteristics: a construction that is especiallyadapted to small coking plants, in that it provides a regeneratorconstruction that permits control of the flow through the regeneratorsand through the flame flues to be effected entirely from one side of.the battery with the required flexibility of operation essential foremployment ofthe combination oven principle, whilepreventing shortcircuiting of the flowing medium from one regenerator into another; and,as a fea ture that may be secured by the above structural means, a novelsystem of control of the flow through the flame fines of the heatingwalls, permitting flow in the same direction through all the flame finesof each heating wall, with discharge of the flow from the I burningflues into the outflow operating flues at points loca ed remotely fromthe gas or distillate outl ts of the coking chambers, with the resultthat the hot waste gases are carried away from the valuable distillatesflowing to the collecting main and overheating and destruction of thedistillates are checked. I

Moreover, the improved flue construction permits an increase in theheight of the flame flues, with a corresponding increase in the heightof the coking chambers so that the latter may be made narrower in width,a development greatly facilitating the coking of high volatile coalswith adequate coking capacity in small coking plants, and

while having adequate provision of taking care of the increased volumeof combustion products, without making it necessary to enlarge thehorizontal flue dimensions to sizes inconsistent with adequate strengthof troducing elements 0 Serial No. 476,677.

is furthermore of great importance in oven batteries fired withextraneously-derived gas, such as producer gas, since the employment ofsuch gas results in an increased volume of combustion product andadequate flue space must be provided to collect and feed to the downflowoperating flues this increased volume of combustion products. By theinvention, the flue construction may be adequately accommodated to suchincreased volume of combustion roducts, without inweakness into the wallconstruction.

In addition to the general objects recited above, the inventioncontemplates a novel regenerator construction and system of flowtherethrough and through the fines, promoting uniformity ofdistribution, and has for further objects such other improvements oradvantages in construction and operation as are found to obtain in thestructures and devices hereinafter described or claimed.

In the accompanying drawings, forming a part of this specification, andshowing for purposes of exemplification, a preferred form and manner. inwhich the invention may be embodied and practiced but without limitingthe claimed invention to such illustrative instance or instances: Figure1 is a composite. side elevational view, looking on the opposite sidesof a coke oven battery embodying features above specified and equippedwith the improvements of the present invention;

Fig. 2 is a crosswise vertical section through the'coke oven battery,the view being taken longitudinally through a heatin wall andaregenerator, in planes indicated by the line A-A ofFig. 4;

Fig. 8 is a composite crosswise vertical looking toward the pusher sideof the coke oven battery and showing partly in section and partly inelevation the valve control devices for controlling the flow through theregenerators and through the flues;

Fig. 7 is a plan view of the regenerator flow control devices shown inFig. 6; and,

. Fig. 8 is an enlarged vertical sectional elevation 'taken transverselythrough the pusher side of the battery, in a plane indicated by thelineLL of Fig. 7.

The same characters of reference designate the same parts in each of theseveral views of the drawings.

In the embodiment illustrated in the drawings, the invention isincorporated in a small combination coke oven battery, i. e., a batteryhaving provision for being operated'optionally with producer gas as thefuel or with coke oven gas. A small coke oven battery having thesegeneral features is described and claimed in my application for patentfor a coking retortoven filed April 23, 1920, Serial No. 376.126, nowPatent No. 1,416,322, dated May 16, 1922. For convenience, the presentdescriptibn will be confined to the present embodiment of the inventionin such a combination oven battery; the novel feaures and improvementsmade by the invention are, however, susceptible of other applications,such, for examle, as ordinary so-called coke ovens employing coke ovengas as the fuel, or ordinary so-called gas ovens employing producer gasas the fuel: hence the scope of the invention is not confined to thespecific use and specific embodiment herein described as an illustrativeexample.

Referring to the drawings: there are illustrated views of a coke ovenbattery or plant of the I by-product type, having features abovespecified: said oven battery'embodies in its construction .a pluralityof crosswise elongated heating walls 11. 11 and a plurality ofintermediate crosswise elongated vertical coking chambers 12. 12. Theheating walls 11 form the side walls of the respective coking chambers12, as shown more particularly in'Figs. 1 and 4, and, in thepresentinstance, are directly, supported by the heavy supportingpillarwalls 13, 13 which extend crosswise of the battery and are located, asshown in Fig. 4 beneath the respective heating walls 11, 11. Thesepillar walls. together with other walls hereinafter described,collectively form the main support for the entire superstructure of theoven battery and are themselves supported upon a flat mat or platformwhich constitutes the sub-foundation on which the entire battery rests.

The coal to be coked is charged into the several coking chambers orovens through charging holes 14 located in the top 15 of the ovenbattery and positioned directly above the ovens or chambers 12, as shownin Fig. 3. These charging holes 14 are equipped with the usual removablecovers, which are removed during charging of the individual ovens orcoking chambers and are-placed in positions to close the tops of suchcoking chambers during the entire coking or distilling operation. Thegases of distillation pass from the tops of the several coking chambers12 through gas outlets, the latter being in the present embodiment ofthe invention ilocated along the pusher side of the battery, and fromsaid outlets 16 such gases pass through the usual ascension pipes (notshown) into the usual gas collecting main which carries the distillationproducts to the by-product recovery apparatus. Heat for coking thecharges of coal in the several ovens orehambers 12 is derived from theheating walls 11, which, as above mentioned extend crosswise of thebattery at the sides of the coking chambers. Referring now moreparticullarly to Figs. 2, 4 and 5, each heatin tuted of a plurality ofame or combustion fiues 17. The flame fines of each heating wall are, inaccordance with the invention, operatively disposedv into a singlegroup, that is to say all of the flame fiues of each heating walloperate concurrently as upflow or downflow fiues, as will be hereinaftermore fully explained. When the flame fines on one side of a cokingchamber are burning, that is to say, operating for npflow, the flamesfiues on the opposite side of the same coking chamber are operating fordownfiow to permit exhaust of the waste gases. Consequently heating ismaintained con tinuously from end to end on one side of a charge of coalin each coking chamber. the heat being applied to the full length of oneside of each charge during an entire period and. then. after reversal.being applied to the full length of the opposite side of the chargeuntil a subsequentreversal is effected. For convenience, the severalinflow operating combustion fines of the heating walls are respectivelydesignated by the reference character G and the several outflowoperating combustion flues are respectively designated by the referencecharacter H the series of outflow operating fiues alternating, as shownin Fig. 4;. with the inflow operating fiues.

The crosswise regenerators 18 of the retort oven or battery are locatedbelow the aforesaid heating walls 11 and the coking chambers 12, and. inthe present instance, extended in parallelism between the pillar walls13 and the other heavy supporting walls, hereinafter described. Eachregener ator 18 is a chamber extending from side to side of the battery.said chamber containing open brickwork. commonly called checkerwork. andindicated at 20'. with a wall 11.is constidistributing sole channel 21underneath such checkerwork, the channels forming the soles of suchchambers and opening up into the checkerwork.

In the present embodiment of the invention, a heavy Vertical gas tightsupportingwall 22 extends directly beneath thecoking chamber inparallelism between each two adjacent pillar walls 13 and such supporting walls 22, the regenerators of each pair being locatedrespectively on the op posite sides of pillar walls 13 and betweenadjacent supporting walls 22.. As shown the pairs G of regeneratorsalternate with the pairs H. The several walls 22 also have the functionwith the pillar walls 13 'of supporting the weight of the batterysuperstructure. The supporting wall construction provides two series ofcrosswise extending parallel gas tight load-carrying walls located belowth coking chambers and intermediate the heating walls, the supportingwalls of one series 13 being directly beneath the heating walls and thesupporting walls of the other series 22 be ing directly beneath thecoking chambers. The walls-22 which are beneath the coking chambers areconstructed and function not as mere partitions commonly employed, butas true load-carrying gas-tight walls, permitting relatively differentpressures to be maintained in the checkerwork chambers on the oppositesides of said walls, or the flow of different media in the checkerworkchamber separated by these walls, without leakages from one checkerworkchamber into another and without danger of 'miX- ing gases in thechecker work chambers which must be kept separate in this region of thebattery.

The several regenerators of the pairs G and H are heated, inalternation, by the hot combustion products that draw oil from the flameor combustion flues hereinbefore mentioned and then impart such heat toth medium that they feed into these flame lines. In the present instancethe flow through the sefveral regencrators of the pairs G is maintainedconcurrently in the same direction, while the flow through the severalregencrators of the pairs H is maintained concurrently in the oppositedirection, that is to say,-when the flow is pass ing up through theregenerators G, downflow is being maintained concurrently through theseveral regenerators H. Each regenerator is provided with a series ofducts 23 all of which lead respectively to individual flame flues 17 ofthe same heating wall, whereas the ducts 23 of the other rcg'eneratorbetween the same illar walls 13 lead respectively to individual 17 ofthe next adjacent heating wall, as clearly shownin Fig. 4-. With thiscon' struction, each flame flue 17 communicates the has at its top aport or by a pair of ducts 23 with adjacent separate regenerators ofeither the pairs G or the pairs H, and the flow through the regeneratorsG or H,'that are each respectively located on opposite sides of a pillarwall 13, is maintained concurrently in the same direction, that'is tosay both said regenerators are either operating for inflow or foroutflow. i

In the operation of the present embodiment of the invention, th entireseries of flame flues 17 of each heating wall 11 is either burning oroperating for downflow to convey waste products to the regeneratorsbeneath and consequently the regenerators which are connnunicablyconnected with the said flues operate concurrently for flow in the samedirection and in the same manner. The reversal in flow through the flameflues 17 on opposite sides of the coking chamber, and their communicablyconnected regenerators may thus be said to take place longitudinally ofthe oven battery, instead of transversely thereof, as has heretoforebeen a common practice in this art. The reversal of the oven is effectedat the end of an operating period determined by practice, and by meansof any preferred type of reversing mechanism. The function of suchreversal is as follows: the regenerators that prior to the reversal 0erated as inflow regenerators become outtlbw regenerators and theoutflow operating regenerators become nflow operating regenerators; theupburning series of flues switches function with the downflow operatingseries of flues of the next adjacent heating wall, and the supply of gasis turned off from the previously upburning flues and turned on intomeans of the previously operating downburning flues.

Each flame fine 17 of each heating wall opening 2-1 for draft and thepassage of combustion products or waste gases from the flame within theflue. These ports 24,0pen up, in their respective heating walls, intohorizontal or bus lines 25 formedin the heating walls, and respectivelyconnecting all of the combustion fines of their respective heatingwalls. Accord ing to the invention, there is in each heating wall onehorizontal flue 25 which, as shown in Fig. 2, tapers from one end orextremity to the other in such manner that the smallest cross-sectionalarea of the fine is located on the same side of' the battery as that ofthe distillate-outlet 16 ot' the adjacent coking chamber 12. Thetapering channel thus formed serves to distribute the flow equallythrough vthe several fines 17 with which such channel communicates. Atits end of greatest cross sectional area, i. 0., its end that isremotely positioned from the distillateoutlet 16, the horizontal flue 25of each heating wall is communicably connected with the horizontal flueof. the adjacent heating wall in the manner described and claimed in mprior U. S. Patent No. 1,374,546, dated April 12, 1921, e. g.byduct-means, preferably extending over the top of the coking chamberbetween the adjacent heating walls, such as the passageway 26 shown inFigs. 2, 3 and 4. Thus the entire flow from a heating wall, withintheflues of which combustion is being maintained, passes from thehorizontal channel of the burning flues over and into the horizontalchannel of the downflow operating flues of the adjacent heating wall.Moreover, the point of passage of the waste gases from one heating wallinto another is located remotely from the distillate-outlet of theadjacent coking chamber, thereby preventing concentration of heat in theregion of distillate discharge and checkin decomposition or other injuryto the valua le constituents of the distillate.

The draft through the ports 24 may be regulated by means of the usualmovable dampers or sliding bricks 27, positioned in the ordinary way inthe bottoms of the horizontal flues 25 and adapted to be reached byaccess flues 28 which extend from the top of the horizontal fiues 25 ineach heating wall to the top 15 of the battery, there being an accessflue positioned over each flame or combustion flue of each heating wall.

Extending crosswise of the battery in each pillar wall 13 and locatedbeneaththe heating wall 11 thereabove is a gas supply channel 29. Theseveral channels 29' are for the purpose of optionally supplying cokeoven gas to the several flame fiues of the heating walls. For thispurpose, each channel 29 communicates with the individual flues 17 ofits corresponding heating wall by means of ducts 31 that lead from suchchannel 29 individuall into the bottom of individual flues. Wit in theseveral ducts are located the usual nozzles 32. e

The supply of coke ovengas to the channels 29 of the respective heatingwalls 11 is derived from a coke oven gas main 36, located in the presentinstance on the pusher side of the battery and extending longitudinallytherealong, as shown in Fig. 6. Connected with said main 36 is a seriesof supply pipes 37 which terminate respectively in gas guns 39 thatenter inlets of the channels 2.9 below the respective heating walls. Theseveral supply pipes of the-series 37 are individually p)rovided withcontrolling valves 43 operable y valve-operating levers 44, said valveoperating levers being controlled by reversing means, including thereversing cables or rods 33 or 45. In the operation of the battery, whenburning coke oven gas as the fuel, the series of supply ipes 37 to-.gether with theirvcontrolling va ves and operatin levers 44 is disposedinto two groups G* and H, the several devices of the groupdamper-operating G alternating with the several devices of the group H.The coke oven supply devices of the groups G correspond with the fluesof the group G 'and the supply devices of the group H* correspond withthe alternate fines of the group H. The, cables or rods 33 and 45 arecontrolled from a central reversing station, provided with the usualreversing machine, and, assuming that the oven is operating with cokeoven gas, the said cables 33 and 45 are operated at each periodicreversal of the batter to adinit gas either to the group of supp ydevices G or to the grou of sup ly devices H, it being understoo that ony one group of supply devices G or H is connected with the supply of gasfrom the main 36 during each operation of the reversing connections, 33and 45, for the reason that only one group of flues G or H"operates',-during the interval between reversing periods as a burninggroup of flues. WVhile one group of flues operates for combustion, theother group is concurrently operating for outflow of the waste gases, ashereinbefore explained.

Referring now mare particularly to Figs. 6, 7 and 8, the sole channels21 of the several regenerators 18 of both groups G and H, respectivelycommunicate with flow boxes 52 located, according to the presentembodiment of the invention, on

the pusher side of the oven battery. Extending longitudinally of thebattery is an exhaust main orstack tunnel 54 which receives the wastegases or products of combustion exhausted from the several outflowoperating regenerators and carries them to the usual stack. Each flowbox 52 is provided with a port 55 leading to a channel 56 which opens upinto the aforesaid stack tunnel 54. The several flow boxes 52 arerespectively provided with mushroom-valve dampers 57 for opening andclosing the ports 55 with respect to the stack tunnel 54 and thesedampers 57 are operated by levers 58. The flow boxes 52 are, as shown,disposed into pairs G and H corresponding to the pairs of regenerators Gand H and the damper-operating levers 58 of the flow boxes Gr arecontrolled andoperated by a reversing connection or cable 59 andsimilarly the damper operating levers of the flow boxes H are controlledand operated by a reversing connection 60. The reversing connections 59and 60 lead to a reversing station, hereinabove mentioned, and areoperated by reversing mechanism to open either the dampers of theseveral pairs of flowboxes H or the dampers of the several pairs of flowboxes G As shown in th drawing, the dampers of the pairs of flow boxes Hare open whereas the dampers of the pairs of flow boxes G are closed,inasmuch as the regenerators H are shown as operating for levers 62 ofthe air boxes H are controlledand operated by a reversingfconnection 64.\Vhen operating with producer gas as the fuel, the levers 62 of one airbox of each of the pairs G and H", such as the air boxes P aredisconnected from their respective cables 63 and 64 and the lids 61 ofthe series of flow boxes P are fastened down by cleats 7 5, as shown inFig. 7.

Also extending longitudinally of the battery on'the pusher side thereofis a producer gas main 68leading from a suitable source of supply ofproducer gas and adapted to be opened up to or, shut off from its sourceof supply by means of an operating controlling valve. Leading into eachflow box of the series P is a producer gas supply pipe 76, said producergas supplypipes being individually connected with the producer gas main68 by means of vertical pipes77. The vertical pipes -.77 are providedwith individual valves 78 for controlling the flow of producer gas intothe supply pipes 76, with which such vertical pipes. 77 are connected.The supply pipes 76 are provided with operating valves 79 having levers80. The levers 80 corresponding to the flow boxes P of the pairs G arecon-trolled and operated by a reversing cable or connection 81, and

the levers 80 corresponding to the flow boxes P of the pairs H arecontrolled and operated by a reversing connection 82.

The operation of the coke'oven battery, when employing an extraneouslyderived special generator gas, such as ordinary producer gas as the fuelis as follows: The supply of coke oven gas to the coke oven gas main 36is cut off andi the reversing connections of said main areleft idle. Asupply of producer gas is however, turned on into the producer gas main68 by opening the main valve of such producer gas main and the producergas enters the vertical pipes 77 and passes into the branch pipes 76.0feither the producer gas flow boxes of the pairs G or of the pairs HAssuming that the several regenerators G are operating for inflow andthe communicably connected flues G as burning flues, the reversingcables 81 and 63 are operated to permit roducer gas and air to flow intothe flow oxes P and A of the pairs G the dampers 57 of said I air boxesbeing closed by the reversing connection 59. Concurrently the reversingconnection 60 is operatedto open the dampproducer gas to ers of the flowboxes of the pairs H where by the latter operate as outflow boxes W andthe cables 82 and 64 are concurrently operated to shut off the supply ofair and the flow boxes H The producer gas thus flows into theregenerators P of the pairs G and passing through said regenerators ispreheated before being delivered into the burning flame flues G. Duringthe inflow of producer gas through said regenerators P waste gas fromthe down-burning fines is flowing out through the regenerators H thatare operating as waste gas regenerators W. In the regenerators A of thepairs G inflow of air is maintained and passing outwardly through suchregenerators finally enters the burning flarne fines to support thecombustion of producer gas that is delivered thereto by the regeneratorsP. On reversal of the flow, by means of reverseoperation of the severalconnections hereinabove described from the reversing station, the inflowoperating regenerators andflues become outflow regenerators and finesand concurrently the outflow regenerators and flues become inflowoperating regenerators and flues.

Inoperating the battery with coke oven gas as the fuel, the supply ofproducer gas to the main 68 is shut off and air is permitted to flowinto the regenerators P at each reversal in place of the producer gas.This is accomplished by connecting the lids 61 of such regenerators Pwith the reversing connections 63 and 64. During coke oven gasoperation, a supply of coke oven gas is maintained in the channels 29which The reversing feed the upburning flues. mechanism is operated ateach reversal to place all of the inflow operating regenerators incommunication with the outer air and concurrently all of the outflowoperating regenerators in communication with the exhaust. Alternatively,during such coke oven gas operation, some of the regenerators, such asthe regenerators P may be employed for conveying to the fines a neutralgaseous diluent such as return waste gas, to lengthen the flames in theflues, in the manner and for the purposes set forth in my co-pendingapplication Serial No. 376,- 126 filed April 23, 1920, now Patent No.1,416,322, dated May 16, 1922.

The invention as hereinabove set forth is embodied in a particular formof construction but may be variously embodied within the scope of theclaims hereinafter made.

I claim:

1. In a coke ovenbattery, incombination: a plurality of coking chambers,each provided at one side of the battery with a dis- .tillate outlet;heating walls contiguous to tapered horizontal flue in each heatingwall,

the horizontal flues respectively connecting the combustion flues oftheir respective heating walls; each horizontal flue being alsocommunicably connected with the horizontal flue of an adjacent heatingwall by outflowduct means located on the opposite side of the batteryfrom the distillate outlet of the adjacent coking chamber; andindividually regulable and reversible regenerators each extendingcrosswise of the battery from sideto side thereof such regeneratorsbeing communicably connected in pairs with the combustion flues of asingle heating wall; sub stantially as specified.

2. In a coke oven battery, in combination: a plurality of cokingchambers, each provided at one side of the battery with a distillateoutlet; heating walls contiguous to such coking chambers andrespectively constituted of vertical combustion flues; a

. tapered horizontal flue in each heating wall,

the horizontal flues respectively connecting the combustion flues oftheir respective heating walls; each horizontal flue being alsocommunicably connected with the horizontal flue of an adjacent heatingwall by outflowduct means located on the opposite side of the batteryfrom the distillate outlet of the adjacent coking chamber; andindividually regulable and reversible. regenerators each extendingcrosswise of the battery from side to side thereof, such regeneratorsbeing cominunicably connected with the combustion flues of the heatingwalls; substantially as specified.

3. In a coke oven battery, in combination: a plurality of cokingchambers; heating walls contiguous to such coking chambers andrespectively constituted of vertical cornbustion flues; a taperedhorizontal flue in each heating wall, the horizontal flues respectivelyconnecting the combustion flues of their respective heating walls; eachhorizontal flue being also communicably connected by outflow-duct meanslocated at one end of said horizontal flue with the horizontal flue ofan adjacent heating wall; and individually regulable and reversibleregenerators eac extending crosswise of the battery from side to sidethereof, such regenerators being communicably connected in pairs withthe combustion flues of a single heating wall; substantially asspecified.

4. In a cok oven battery, in combination: a plurality of cokingchambers; heating walls contiguous to such coking chambers andrespectively constituted of vertical coinbustion flues; a taperedhorizontal flue in each heating wall, the horizontal flues re spectivelyconnecting the combustion flues of their respective heating walls; eachhorizontal flue being also communicably connected by outflow-duct meanslocated at one end of said horizontal flue with the horizont-al flue ofan adjacent heating wall; and

individually regulable .and reversible regenerators each extendingcrosswise of the battery from side to side thereof, such regeneratorsbeing communicably connected with the combustion flues of the heatingwalls; substantially as specified.

5. In a coke oven battery, in combination: a plurality of cokingchambers; heating walls contiguous to such coking chambers andrespectively constituted of vertical combustion flues, all of thecombustion flues of a heating wallbeing commnnicably connected with thecombustion flues of an adjacent heating wall said communicating meanscomprising a bu flue having an outflow duct disposed at one end.thereof; and individually regulable and reversible regenerators eachextending crosswise of the battery from side to side thereof, suchregenerators .being communicably connected in pairs with the combustionflues of a single heating wall; substantially a specified.

6. In a coke oven battery, in combination: a plurality of cokingchambers; heating walls contiguous to such coking chambers andrespectively constituted of vertical com bustion flues, all of thecombustion flues of a heating wall being communicably connected with thecombustion flues of an adjacent heatin wall said communicating meanscomprising a bus flue having an outflow duct disposed at one endthereof; and individually regulable and reversible regenerators, eachextending crosswise of the battery from side to side thereof, suchregenerators being cominunicably connected with the combustion flues ofthe heating walls: sub: stantially as specified.

7. In acoke oven battery, in combination: a plurality of cokingchambers, each provided with a distillate outlet; heating wallscontiguous to such coking chambers and respectively constituted ofvertical combustion flues; a horizontal flue-in each heating wall, thehorizontal flues respectively connecting the combustion flues of theirrespective heating walls; each horizontal flue being communicablyconnected with the horizontal flue of an adjacent heating'wall byoutflowduct mean located remotely from the distillate outlet of theadjacent coking chamber; and individually regulable and reversibleregenerators communicahly connected with the combustion flues of theheating walls; substantially as s ecified.

8. In combination wit a coking chamber, flued heating walls respectivelyconstituting the opposite sides of said coking chamber, the flues of theheating walls being communcably connected with each other by duct meanseach having an outflow duct at one end thereof. reversible means formaintaining combustion in alternation in such heating walls, andreversible rcgenerators extending from end to end of the coking chumher,the regenerators being jointly operable for conveying air to the saidfines, or separetely operable for conveying air and an extraneousiyderived gas; substantially a specified.

9. In combination with a coking chamber, fined heating Wallsrespectively constituting the opposite sides of said coking chamber, theflues of the heating walls being communicably connected with .each.other by duct means, each havin an outflow duct at one end thereof,reversi le mean for maintaining combustion in alternation in suchheating walls, and reversible regenerators extending from end to end ofthe coking chamber; substantially as specified.

10. In combination with a coking cham-v her, fined heating Wallsrespectively constituting the opposite sides of said coking chamber, thefines of the heating Walls being coinmunicahly connected with each otherby duct means extending over the top of the cokingchainber, each of saidconnecting ducts being provided with an outflow duct disposed at one endthereof, reversible means for maintaining cornhustion in alternation insaid heating Walls,the exhaust gases produced by the combustion in oneheating well being drawn off through the other, and reversibleregenerators extend ing from end t0 end of the coking chamber andrespectively connected with said heating Walls; substantially asspecified.

JOSEPH BECKER,

